Safety circuit of automatic transmission control system
US4363973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1981 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Sep 22, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A safety circuit in an automatic transmission control system having a comparator producing a transmission shifting control signal wherein upon comparing a vehicular velocity responsive signal and a throttle opening responsive signal, the safety circuit comprises: PA1 a comparator whose inverting input terminal is supplied with the vehicular velocity responsive signal through a capacitor and whose non-inverting input terminal is supplied with a constant voltage signal which is lower than the inverting terminal signal at normal state, the comparator detecting the difference between the two input voltages; PA1 a transistor circuit for connecting to ground said transmission shifting control signal; and PA1 a latching circuit for latching the output signal of the transistor circuit, PA1 whereby an abrupt loss of the vehicluar velocity responsive signal is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.